Question

我正在尝试使用OpenCV在java中创建一个app来从web服务中获取视频流，这是一个带有几个摄像头和录制设备的摄像头系统。

我找到了地址“rtsp：// login：pass @ IP address：port / cam / realmonitor？channel = 1＆amp; subtype = 0”，用于访问频道1上的摄像机。

为了打开相机流，我已经使用了这段代码（它可以捕获一台本地USB相机）：

VideoCapture上限; Mat2Image mat2Img = new Mat2Image（）;

public VideoGrabber(){
    cap = new VideoCapture(0);

    try {
        System.out.println("Sleeping..");
        Thread.sleep(4000);
    } catch (InterruptedException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    System.out.println("Camera on..");
    cap.open("0");
    if(!cap.isOpened()){
        System.out.println("Camera Error");
    }
    else{
        System.out.println("Camera OK?");
    }
}

抓取视频流后，我将其放入JFrame。

我想我应该将视频流服务地址放在cap.open（...）中但是使用rtsp：// login：pass @ http://192.168.1.14:8006/cam/realmonitor?channel=1&subtype=0给了我“线程中的异常”AWT-EventQueue-0“ java.lang.IllegalArgumentException：Width（0）和height（0）必须是＆gt; 0“。

请帮忙，

EDIT 我发现rtsp：// login：pass @ http://192.168.1.14： 554 / cam / realmonitor？channel = 1＆amp; subtype = 0在vlc中工作但在opencv中仍然没有运气。< / p> 编辑＃2。编辑＃2 好。在玩了vlcl，gstreamer和大多数流行的解决方案后，它才刚刚起步。毕竟我不知道rtsp地址是不是坏了。代码：

static {
        System.loadLibrary(Core.NATIVE_LIBRARY_NAME);
        //load the library of opencv
    }

    VideoCapture cap;
    Mat2Image mat2Img = new Mat2Image();
    Mat matFilter = new Mat();

    public VideoGrabber(){
        cap = new VideoCapture();

        try {
            System.out.println("Sleeping..");
            Thread.sleep(1000);
        } catch (InterruptedException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        System.out.println("Camera on..");
        cap.open("rtsp://login:pass@192.168.1.14:554/cam/realmonitor?channel=1&subtype=0");
        if(!cap.isOpened()){
            System.out.println("Camera Error");
        }
        else{
            System.out.println("Camera OK?");
        }


    }

Answer 1

回答我的问题，对于Fouad，我发布了工作代码：我猜的答案是加载ffmpeg dll。

//all the imports
public class App {
static {
    String path = null;
    try {
        //I have copied dlls from opencv folder to my project folder
        path = "E:\\JAVA Projects\\OpenCv\\RTSP Example\\libraries";
        System.load(path+"\\opencv_java310.dll");
        System.load(path+"\\opencv_ffmpeg310_64.dll");
    } catch (UnsatisfiedLinkError e) {
        System.out.println("Error loading libs");
    }
}

public static void main(String[] args) {

    App app = new App();
    //Address can be different. Check your cameras manual. :554 a standard RTSP port for cameras but it can be different
    String addressString = "rtsp://login:password@192.168.1.14:554/cam/realmonitor?channel=11&subtype=0";
    Mat mat = new Mat();
    VideoCapture capturedVideo = new VideoCapture();

    boolean isOpened = capturedVideo.open(addressString); 
    app.openRTSP(isOpened, capturedVideo, mat);

}

public void openRTSP(boolean isOpened, VideoCapture capturedVideo, Mat cameraMat) {
    if (isOpened) {
        boolean tempBool = capturedVideo.read(cameraMat);
        System.out.println("VideoCapture returned mat? "+tempBool);

        if (!cameraMat.empty()) {
            System.out.println("Print image size: "+cameraMat.size());
            //processing image captured in cameraMat object

        } else {
            System.out.println("Mat is empty.");
        }
    } else {
        System.out.println("Camera connection problem. Check addressString");
    }
}
}

使用Java中的OpenCV 3.1捕获rtsp视频流

1 个答案: